66530012 has 12 divisors (see below), whose sum is σ = 116591496. Its totient is φ = 33218160.

The previous prime is 66529997. The next prime is 66530029. The reversal of 66530012 is 21003566.

It is a self number, because there is not a number n which added to its sum of digits gives 66530012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8414 + ... + 14277.

It is an arithmetic number, because the mean of its divisors is an integer number (9715958).

Almost surely, 2^66530012 is an apocalyptic number.

It is an amenable number.

66530012 is a deficient number, since it is larger than the sum of its proper divisors (50061484).

66530012 is a wasteful number, since it uses less digits than its factorization.

66530012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23428 (or 23426 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 66530012 is about 8156.5931613634. The cubic root of 66530012 is about 405.2028897568.

Adding to 66530012 its reverse (21003566), we get a palindrome (87533578).

The spelling of 66530012 in words is "sixty-six million, five hundred thirty thousand, twelve".